參數(shù)資料
型號(hào)： ARM610
廠商： Zarlink Semiconductor Inc.
英文描述： General purpose 32-bit microprocessor
中文描述： 通用32位微處理器
文件頁數(shù)： 86/173頁
文件大小： 897K
代理商： ARM610
Instruction Set - Examples
ARM610 Data Sheet
4-58
O
4.16.2 Pseudo-random binary sequence generator
It is often necessary to generate (pseudo-) random numbers and the most efficient
algorithms are based on shift generators with exclusive-OR feedback rather like a
cyclic redundancy check generator. Unfortunately the sequence of a 32-bit generator
needs more than one feedback tap to be maximal length (i.e. 2^32-1 cycles before
repetition), so this example uses a 33-bit register with taps at bits 33 and 20. The basic
algorithm is newbit:=bit 33 eor bit 20, shift left the 33-bit number and put in newbit at
the bottom; this operation is performed for all the newbits needed (i.e. 32 bits). The
entire operation can be done in 5 S cycles:
; Enter with seed in Ra (32 bits),
Rb (1 bit in Rb lsb), uses Rc.
;
; Top bit into carry
; 33-bit rotate right
; carry into lsb of Rb
; (involved!)
; (similarly involved!)
; new seed in Ra, Rb as before
TST
MOVS
ADC
EOR
EOR
Rb,Rb,LSR#1
Rc,Ra,RRX
Rb,Rb,Rb
Rc,Rc,Ra,LSL#12
Ra,Rc,Rc,LSR#20
4.16.3 Multiplication by constant using the barrel shifter
Multiplication by 2^n (1,2,4,8,16,32..)
MOV
Ra, Rb, LSL #n
Multiplication by 2^n+1 (3,5,9,17..)
ADDRa,Ra,Ra,LSL #n
Multiplication by 2^n-1 (3,7,15..)
RSB
Ra,Ra,Ra,LSL #n
Multiplication by 6
ADD
Ra,Ra,Ra,LSL #1; multiply by 3
MOV
Ra,Ra,LSL#1; and then by 2
Multiply by 10 and add in extra number
ADD
Ra,Ra,Ra,LSL#2; multiply by 5
ADD
Ra,Rc,Ra,LSL#1; multiply by 2 and add in next digit
General recursive method for Rb := Ra*C, C a constant:
1
If C even, say C = 2^n*D, D odd:
D=1:
MOV Rb,Ra,LSL #n
D<>1:
{Rb := Ra*D}
MOV
Rb,Rb,LSL #n
相關(guān)PDF資料
PDF描述
ARM7TDMI 32-Bit Advanced RISC Machines(ARM) Microprocessor Core(32位ARM微處理器內(nèi)核芯片)
ART10012T 28V Input, Triple Output / HYBRID - HIGH RELIABILITY RADIATION HARDENED DC/DC CONVERTER
ART10015T 28V Input, Triple Output / HYBRID - HIGH RELIABILITY RADIATION HARDENED DC/DC CONVERTER
ART2812T 28V Input, Triple Output / HYBRID - HIGH RELIABILITY RADIATION HARDENED DC/DC CONVERTER
ART28XXT 28V Input, Triple Output / HYBRID - HIGH RELIABILITY RADIATION HARDENED DC/DC CONVERTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ARM7-009 制造商:Gravitech 功能描述:ARM7 LPC2378 W/2.8" TCH SCRN LCD BLU
ARM720T 制造商:未知廠家 制造商全稱:未知廠家 功能描述:General-purpose 32-bit Microprocessor with 8KB cache, enlarged Write buffer, and Memory Management Unit (MMU) combined in a single chip
ARM7DIMM-LPC2478 功能描述:模塊化系統(tǒng) - SOM LPC2478 ARM7 DIMM Module, Rev 2.2 RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲(chǔ)容量:8 MB, 16 MB 存儲(chǔ)類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
ARM7TDI 制造商:未知廠家 制造商全稱:未知廠家 功能描述:周立功的中文ARM7TDI文檔
ARM7TDMI 制造商:未知廠家 制造商全稱:未知廠家 功能描述:general purpose 32-bit microprocessors
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*